Spark-extinguishek



UNITED STATES PATENT OFFICE.

D. S. HARRIS, OF GALENA, ILLINOIS.

SPARK-EXTINGUISI-IER FOR STEAM-BOILERS.

Specification of Letters Patent No. 27,799, dated April 10, 1860.

T 0 all whom it may concern:

Be it known that I, D. S. HARRIS, of Galena, in the county of Jo Daviess and State of Illinois, have invented a new and useful Spark-Extinguishing Device for the Furnaces of Steam-Boilers; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure l, is a front elevation of a steam boiler, with one of its smoke pipes bisected, as indicated by the line x, Fig. 2. Fig. 2, a plan or top view of ditto with one of its smoke pipes bisected as indicated by the line y, y, Fs- 1 Similar letters of reference indicate corresponding'parts in the two gures.

This invention consists in the employment or use of a wire screen water trough and water supply and discharge pipes, and also Scrapers, arranged within the smoke pipes of a furnace substantially as hereinafter described, so that the smoke and gaseous products of combustion will be allowed to readily escape and pass up the smoke pipe, while the sparks will be arrested, extinguished and discharged from the lower part of the smoke pipe.

To enable those skilled in the art to fully understand and construct my invention I will proceed to describe it.

A represents a steam boiler, and B, B, its smoke pipes, with the lower ends of which the flues C, of the furnace communicate. In the lower parts of the smoke pipes B, B, wire screens D, are placed, one in each, and these screens extend across the pipes B, to arrest the upward passage of the sparks, the mesh of the screens being sufficiently small for that purpose.

Directly below each screen D, an inclined trough E, is placed. These troughs have each a discharge tube a connected to it at one end, said tubes extending through the smoke pipes at their lower parts as shown clearly in Fig. l.

F, is a tube which communicates with any suitable reservoir of water. This vpipe eX- tends to the back part of the boiler and is connected to a cross tube G, the ends of which pass into the smoke pipes B, B, and are curved down directly over the higher ends of the troughs E. In each trough E, a scraper H, is placed.

The operation is as follows: The smoke and gaseous products of combustion pass up through the screens D, but the sparks are arrested by them and thrown into the troughs E, and a stream of water which is kept running through the troughs from the tubes F, Gr, extinguishes the sparks and carries them out from the troughs through the discharge tubes a.

The Scrapers H, admit of the troughs being readily cleaned out if obstructed by substances or sparks which might chance to lodge in them.

The invention is extremely simple and may be applied at a very moderate cost.

Having thus described my invention what I claim as new, and desire to secure by Letters-Patent is- 1. The wire screens D, and troughs E, placed within the lower parts of the smoke pipes B, in connection with proper water supply tubes F, G, and discharge tubes a,

substantially as and for the pur-pose set forth.

2. I further claim in connection with the wire screens D, and troughs E, and watersupply pipes the Scrapers H, as and for the purpose set forth.

D. S. HARRIS.

Witnesses:

B. H. CAMPBELL, LAFE HOLMES. 

